Hacksaw frame



C. SPRAGUE HACK SAW FRAME Jan. 16, 1951 Filed Sept. 20,'1944 NM mm Nw @nlll/lr6. 532

Patented Jan. 156, 1951 l 2953,48@

UNITED STAT-Es nffiirinvii# ogame?if:

` assenso? HACKSAW FRAME Clifford.Spraguemyvilmarr .Applicationseptember zogneiligsriai No.;554 i955 ,3.91am (e1-seen 1 2 :My.inventionrelates I.110haeksawrframes. and Eig. 5i isl ganenlarged sectional. Viewthereof .among the objects ofvmyinvention are: 'tklfJh- Tug i-,FigliaFirst, toprovide a. haeksaw frame whereinfzthe The hacksawefljelleiDClldES-a main st llltl 0f .spacing between the. hacksaw blade and backbar llztrxrlelfforni, which isattdiedlts'ir' @11d othe; frame maybeereadilyand. quickly. Varied. f to ;.a ;handle frame-2. lhe handle'frarneei'sf U- 'Secondgto prox/'idea hacksaw framewhich inshmdfinzirm.andpneleg. thereof isenca'sed in corporates novelend fittings for thevhaeksaw a moldedhandle.- The rnan` strut isfseeur'ed to t blade whichareso arranged that evenwhen the v the ;c ross pertinIly andtheIemabilig1 Q5 0f blade is loosened to permit adjustment of vitstherhandle ame ljhelegifxtends,itgright angularrelation with :theframe-or-its spacefrorn` 10 .anglestothe ain strut. L theback bar,A thebladefcannotall out ofthe end .fllhegmaen str utvlreeives an adjustablestrut fttngs; however,` at least.` one ofytheendfttngs S Whvchis-vshapedv onefile'gfitting wthin'the being adapted to move onto thebackbar;of. .thev mainstrutvand--theothgl;legffdiSpOSed't fight :frame .topermit, ,when in..suchzpositiomready angles-,thereto ,'lhQrnannerinwhioh thernain .nsertionor removal of the blade. 15;;Strutarld ad'j-ustabl y struts are'onrfleeted iseon- Third, to provide ahacksawfirarnemhiehtinventonal, and therefore not 'shownin 'detaillf'corporates a novel handle constructionawherein lfheflegs-,fandltalrrys.slide. IAr'ievrr1l )`er's and 9. y. the connectionbetweentheihandle andrthe frame 'Ilm-slide members @$62.111 the fr lrrnobars'havis in alignment. with thehacksawbladathe hanirlgfsllansyerse;Slots M ;Whih reeive the ylegs 5 y dle being so arranged. thatit Amaybeplaced in` meandri; lThe eXtrernities'otthe legs lrnaylbe'"upset Manyangular relation with Athe `U -braeket.,which or staked aslindicatedby^I II to retain the'slide joins the ends of the h acksaw blade.membersthereom The slide Inmbers' 8 and 9 Fourth, to provide. ..haeksaw.frame which.. by are :substantially: the; Same eJXefDt'.thatltheslideAreasonof the angulary and .spacing adjustment of ...membergwhiheitshthez; rearhlgifjs .lo'llger the biade andL angular adjustmentof. thailandia. zsnthanthe slidememherfgand alsoits 'slot islo'neerpermits .use of. the .hacksaw in awkwardplaces to permitlimitedlongitudinal rnovernent relative Whereaconventional.haksawcould'notiba-used. tQeiheoleg- @thumb SGI'GW vl2 VShlfeldedvifrvlt With the4 aboveA and other.. object-,sin .viewcasthearear end -oithe slide'member Sand-entersthe mayappear hereinafter,reterencejs directed to s101310 tqengage the leg 5. Y

rtheaccompanying drawings, in which.: 30,. EachfslidelmQmbBIS,lfJruOVided With a Socket Fig. 1 is a vfragmentary sideelevational .View:i3 WhG1 1 `-.C1Ye5fa4 m |4- Thegrftm |4- is -of,the-:hacksaw lframe.showing by dotted linesian ...D lQVds-rd. .with a; heady l5. WhChiS heldWithin -.adjusted position `of the-.hacksaw blade, .anduby the SOCKET]I3 by a Sh01l1le1`--l6 4f01"1fndby.rolling Y. other dotted lines the.position ofone or theend in war-.dfthefmouthbf the 'socket i3. E acnhadttings.v when removing or inserting. a hacksaw ,f. l5 f. ;S.(3.813dl-0160filinittdV axial .rnbveme-nt` in its 'blade sgevket I3.YSlqts ell are provided: in the periphery Fig.- 2 vis aner1larged..f.ragmentary sectional Offah 11e-@ 1395- hQSSLSlQS4.treppI'Cfelllli10- v View through 2-2 oil'igure lshowingtheecon--C'llteilifogaplt- At. a. Suitable?. Point in the-,DB-

nection between one of the end fittings and-.the .;1". Dl.1I`Yc0f,15h-f? '.Sietl la-Stake .la S .fQllled haoksaw blade,ano-illustratingme .manner in 40 .r=1ori dinean,iQQrMLPIQJQQQn adaptedto ft ywhiel'iztheA blade is retainedand the manner. in any .^0f..?l1-S19t5y|tand PleYCIlt I "Qlifiiolfl Of the --Whicheit is inserted vor.removedowhentheiend Stem Hl The Stake engages the SlOS when the-.attingisinrheproperposition. head J5 .viS-mQvedg-.teward the sheulcler I6 and .Figure 2A is a sectional View through. .2A-. 2Aidiseneages,thQ;,SlOtS.SQ:thatthastem VH lrriav be of Figure l showingin elevationone lof ,the .end 4.5.1IQP9GC1 Whenhe.hedfsfmOi/d Dt0,.}h-S9Cwkeb rttings on the strut of thehacksawiframein the Ypositionassumed when. inserting or..removing a I'hteXeIldlndof'eachstern `Iiliisgproviciled \.hacksaw blade, the hacksaw .blade .beingshown *.Wt'ha 1.10.tch;| .9. C1117h1"i11 @1011 the longitudinal tiltedabout its longitudinalaxis for..this. puraXSz0ffthe S tem.; -Theaxial-end.oieachnotch I9 .pose f 50.;is.;undereutzasindieated.by 20.Qutwardlvfrom Fig. 3y isa transverse sectional .viewof thefend:.hesllndelllt' ..pirlyl .eXtendS into llhetspace Attingtaken through3-.3 of Fig. 2. .formedabythe notch.V vlilach vpin 2l is. disposed Fig.l4, is a fragmentary side elevational .View ...in. convergingrelationwith the slope ofthe unf 'ofoa modiedvform of. hacksaw..frame:wherein de.rcut2f5.Iv .ir f:thevhansie-isattachedvon anaxisaligningewith 55-vTbeanronortionssoi; the-notch J9,- undercut thehacksaw blade, 20, and the pin 2|, which together form a houle 3element, are such that a conventional hacksaw blade B can only beinserted or removed when the plane of the hacksaw blade is in angularrelation (approximately 45) with'the axis of the stem,

as shown in Figure 2A. However, this angularV relation can only beassumed when the slide member is on the strut 6 and its longitudinalaxis is in substantial angula1` relation, that is, the angular positionof the hacksaw blade shown by broken lines in Figure 1.

When the slide is on the leg 1 this necessary angular relation cannot beobtained and, hence,

even though the blade be loosened, it cannot fall free. Y

This is of primary practical importance for it enables one to adjustwith ease the angular relation of the blade with respect to the hacksawframe, or to move the slide members and blade along the legs and -1 foradjusting the spacial relation between the blade and the main strut l ofthe frame. Not only may the blade be moved in a parallel `plane,'but oneslide may be moved further than the other to dispose the blade inangular relation with the main strut. This adjustment enables thehacksaw to be used in cramped quarters where a conventional hacksaw fromthe mandrel 34, and is provided with aseoond threaded portion 31 whichreceives a nut 38 for securing the stem to the ferrule 32. A handle 39which may be formed of a molded plastic, is provided with a handle arm40 of metal extending therefrom and provided with a tapered socket 4lwhich fits over the tapered mandrel- 34. The axial extremity of thehandle arm 40 and a shoulder formed at the base of the tapered mandrel34, may have complementary serrations #l2/so that when the handle arm istted onto the mandrel it may be secured against rotation. A hole isprovided axially through the handle arm 4B to receive the secondthreaded portion 31, and a knurled nut 43 is provided for adjustablysecuring the handle arm to the ferrule 32.

With this arrangement the handle, arm, and ierrule, maj,T be rotatedbodily as a unit to draw the slide member 8 laterally across the leg ofthe U-rame until the blade is suftlciently tightened. Thereupon theknurled nut V43 may be loosened and the handle turned until in thedesired angu- Vlar relation (normally in the planeof the could not beemployed. By way of example, this adjustment of the haclrsaw bladeenables the hacksaw to be used for the purpose of severing boiler tubeswhere the clearance between the tubes is less than the extended distancebetween the haclisaw blade and the back of the hacksaw. The hacksaw maybe slipped into place with the blade, for example, in its dotted lineposition, and as the tube is cut the hacksaw blade may be adjustedoutwardly.

When the slides are loosened and the slide 9 'is in the dotted lineposition shown in Figure l;

that is the position shown in Figure 2A, the blade Y may be rotated ortwisted about its longitudinal axis while Ythe other end remainsattached to the stem of the'slide 8. This movement about Vthelongitudinal axis of the hacksaw blade may be continued until the bladeis tilted sufficiently vto vclear the pin 2i as shownbest in Figure 2A..

Once this end of the blade is unhooked from slide 9 the blade may betilted about either its longitudinal axis or transverse axis until freeto disengage the stem of the slide 8. Thus, to

install the blade in the hacksaw frame the bladeL is rst secured to thestem of the s lide'S and then to the stem of the slide 9, and to removethe blade, the steps are reversed. Y l

It should be observed that when the slide 3 is loosened sufficiently,its stem may move into theV slide to disengage stake lug I8 and slotsI1, thereby to permit free rotation of the hacksaw blade. The connectionbetween the blade and theY stem Y i4 is sufficiently loose that thelongitudinal axes wherein a special handle adapted for use inconjunction with the slide member E `is employed. In this construction asingle piece'U-frame 3l may be substituted for the main and adjustablestruts i and 6. A tapered ferrule 32 provided with a socket 33 iits overthe slide member 8.

The extended end of the errule forms-a tapered mandrel 313 whichreceives a stem 35.V The stem 35 includes a threaded portion 36 whichextends into the soclret 33 and is threaded into the end of the slidemember Vi3 to engage a leg of the 'y lil-frame V3 l. The stemh alsoextends outwardly ci the U-frame.

The extremity of the ferrule is adapted to bear against the edge of theleg 5 `on opposite sides of the shank to restrain the handle fromrotation once the blade is tightened.

Many other embodiments of this invention may be resorted to withoutdeparting from the spirit of the invention.

I claim:

1. A hacksawconstruction for a hacksaw blade having perforated ends andcomprising: a pair of slides, a hook member carried by each slide, eachhook member having a longitudinal axis and including Va laterallyextending pin and a shoulder confronting said pin, the face of saidshoulder and the axis of said pin converging, whereby the perforated endof a hacksaw blade must be disposed at a substantial angle relative Vtothe hook member to fit over said pin and under said shoulder; a framefor said slides including a track for one of said slides, said trackhaving a bend whereby the hook member of said one slide may be movedbetween a'position in which the longitudinal axesfof saidV hook membersare coaxial, thereby to limit angular movement of said haclsaw blade andretain said haclfzsaw blade thereon, and a position in whichthelongitudinal axes of said hook members are angularly related therebyto permit connection and disconnection between said hacksaw blade andsaidhook mem# bers.

2. A hacksaw construction for a hacksaw blade havingV perforated endsand. comprising: a pair of slides, a hook member carried by each slide,each hook member having a longitudinal axis and including 4a laterallyextending pin and a shoulder confronting said pinthe face of saidshoulder and the axis .of said pin converging, whereby the perforatedend of a hacksaw blade must be disposed at a substantial angle relativeto the hook member to t over said pin and under said shoulder; a framefor said slides including a track for one of said slides, said trackhaving a bend whereby the hook member of said one slide may be'movedbetween a position in of said hacksaw blade and retain said hacksawblade thereon, and a position in which the longitudinal axes of saidhook members are angularly related thereby to permit connection anddisconnection between said hacksaw blade and each hook member having alongitudinal axis and including a laterally extending pin and a shoulderconfronting said pin, the face of said shoulder and the axis of Vsaidpin converging, whereby the perforated end of a hacksaw blade must bedisposed at a substantial angle relative tothe hook member to t oversaid pin and under said shoulder; a frame for said slides including atrack for one of said slides, said tracll` having a bend whereby thehook member of said one slide may be moved between a position in whichthe longitudinal axes of said hook members are coaxial, thereby to limitangular movement of said hacksaw blade and retain said hacksaw bladethereon, and a position in which the longitudinal axes of said hookmembers are `angularly related thereby to permit connection anddisconnection between said hacksaw blade and said hook members; a swivelconnection between each hook member and its slide permitting rotation ofsaid hook member and limited axial movement of said hook member relativeto its slide; and interlocking elements incorporating each hook memberand its slide for positioning said hook member in predetermined angularrelation with said slide.

CLIFFORD SPRAGUE.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 878,160 Stebbins Feb. 4, 1908903,495 Parsons Nov. 10, 1908 1,190,477 Sprague July 11, ,'19161,413,348 Parsley Apr. 18, 1923 1,595,035 Troutman Aug. 3, 1926'1,695,231 Egan Dec. 11, 1928 2,085,667 Macomber June 29, 1937

